Matlack chalked up the minor ailment as part of Turner's growing pains.

"When Turner was in high school, he probably pitched once a week and had plenty of time to recover," Matlack said. "Now, he's in an environment where there's constant throwing and he's taking part in a weight-training program, probably for the first time.

"It's an adjustment from high school to professional baseball."

Turner, the Tigers' first-round pick in the 2009 June amateur draft, signed a four-year contract and received a $4.7 million signing bonus.

The 6-foot-5, 210-pound pitcher was placed on the disabled list Monday, retroactive to April 22, making him eligible to be reinstated to the West Michigan Whitecaps roster as early as Thursday.

"We made the move to put Turner on the DL to give him plenty of time to work out the stiffness and give the West Michigan Whitecaps another arm," Matlack said.

Turner has missed two starts for the Whitecaps.

"I know Turner is eligible to come off the disabled list on the 29th, but it will likely be a day or two after he comes off when he pitches again," Matlack said. "I can tell you, he won't pitch again until he can tell me he has zero pain when he's throwing."